031366 - B6.129P2(Cg)-Il4/Il13/J - jax.orgA targeting vector was designed to insert a loxP-flanked blasticidin (bsd) resistance cassette upstream of exon 3 of the interleukin 13 (Il13) gene, and a frt-flanked neomycin resistance cassette followed by a single loxP site downstream of exon 4 of the interleukin 4 (Il4) gene.The construct was electroporated into 129P2/OlaHsd-derived E14 embryonic ...